Anyone have an evaporation line come up within the time frame of an HPT?

I couldn’t wait and took a test this morning (I’m only 9 dpo...I know lol). I got what looks like an evaporation line, kind of looks like a gray colorless dent in the test. It came up within the test time frame.

What causes this? Did I soak the test too much or is it just because it’s a cheap test? It’s a wondfo brand I ordered on amazon. Anyone else have this?